The Ironclad is very slow, but powerful. It can bombard enemy city fortifications but cannot enter ocean spaces.
Ironclads were the forerunners of future generations of armored naval vessels. Instead of the simple wooden hulls found on the other ships at the time, ironclads were covered with strong metal plating. This plating made them nearly impervious to large-caliber explosive shells that would easily penetrate and destroy wooden vessels. Ironclads made their first appearance during the American Civil War, and quickly gained dominance over other ships of that era. Perhaps the most famous naval battle of the Civil War was the battle between the Confederate ironclad Merrimack, and the Union ironclad Monitor, which lasted for several hours before the Merrimack was forced to withdraw.
The model of the Ironclad unit is based on the USS Atlanta ironclad. However, it is modeled with two funnels while in reality it had only one.